Double-roller pulverizer



NOVQ 29, 192?.

1,650,891 H. S. DICKINSON DOUBLE ROLLER PULVERIZER Filed Jan. 8. 1927 2 Sheets-Sheet l java far Q74??? 5. pj

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Hfififlfifi H. S. DICIKINSDN DOUBLE ROLLER PULVERIZER Filed Jan. 2:. 1927 2 Sheets-Sheet 2 Patented Nova 29, 1927.

nannr s. nicninson, or norms, nun-01s;-

we ran nonnair con-rant,

F BEREA, OI-IIU, A- GOREURJi-TIGN'OY" Cid-131G. A

DQUBLE-BOLLEB ronvnnmnnl Application filed January 8, 192-7. SeTifllNDw159,?52 J This invention relates to double roller pulv-erizers of the general type disclosed 111 the Dunhain Reissue Letters Patent llo. 13,921,. dated June 1, 19l5,'and the ob ect of the present inventionis to overcome certain difficulties inherent in the operation of a double roller pulverizer of the character shown in the said Dunham patent, and particularly to utilize the; draft strains developed during the travel of the implement H1 such a way as to better accommodate the implement to the conditions encountered in rough ground. p

The implement of the Dunham reissue: patent is one which employs rocking. frames as mountings for the front and rear disk axles, with pivotal connections for the rocking frames located above the line between the front and rear axles. This elevated location of the pivot point brings the draft line normally at a point above the front axle, so that in operation on substantially level ground, the draft strain: will bear more heavily uponthe front rank of roller dislrs which is desirable in normal operation 1 n order to utilize the draft strains most advantageously in crushing: down ground 1nequalities encountered by the front rank. However, if the front rank of roller disks drops down into a dead furrow or other depression, the distance of the draft line above the front axle will increase with a re sulting increase in the draft thrust on the front rank which becomes a detriment, in that its tendency is to cause the front rank to dig even more deeply into the bottom of the furrow, and in such circumstances it 18 desirable that the draft be reduced rather than increased in order to better. enable the front rank of roller dislis to ride up out of the furrow.

The object of the present invention is to provide a connection of such character as to retain a normal draft downthrusting effect onthe frontranh, while the machine is traycling over level ground, and to avoid the imposition of any lncrement of the down thrusting draft action When the front rank falls into a furrow and to more elfectively utilize the down thrust of the draft when: the front rank. rides up into a ridge, thereby harmonizing. the. drafteffectto the condi tions actually encountered in the field.

ln order to better understand the special features of the present invention, it is proper to' state that in roller pulverizers of the approvedtype, the following characterist-ics have been developed to secure better hari'nony both n operation and in manufao ture: (I) double sets of rollers, thatis front and rear ranks of rollers; larger rollers infront to do the magor po'rtion of the crushing; (3) smaller rollers in: the

for secondary pulverizing; and smoothing the soilisurface; and (it) a draft frame conneoti o'ntothe roller framesso arranged asto dlslllbll'fie a manor portionof the" deac l weight and also a component of the draft itself to the front rank rollerswhen in use:

The machine of the Dunham reissue pat-- ent conforms to the above conditions,- but as pointed out makes no-provision for utilizing the draft effect in the most advanta geous manner, Further ob ects and details of the present lllYentlOn will appear from a description thereof in connection with the accompanying drawings wherein-- Tiligure 1 is an end elevation of the pres ent invention operating. on level ground,

Fig. 2' is a similar view showing the: position assumed by the parts when the front rank rides into a depression;

Fig; 3 isa similar view showirig the ar rangement ofthe parts when the front rank rides upon a ridge or elevation; and i Fig, d is a fragmental sectional plan View of the connections constituting the" present 7 invention.

It will be understood that the construction of the mountingsat' each end of the roller axles is the same so that a description of one will suffice for both. prises a tongue 10 to the rear end of which are secured frontand rear cross rails 11 con nected at their ends by depending brackets 12 which converge downwardly and: are preferably cored out at the center to reduce theweiglr Each bracket frame atits lower end is provided with arcuately disposed rack teeth 13" extending forwardly from the front edge of the lower portion of the bracket The rear portion of the bracket, behind the rack teeth, is extended to afford aheel l l which provides a mounting for a linlr 15 which is pivoted to the heel by apivot stud 16 or the like, and is pivoted at its forward end by apin or stud 1? to anear 18 extending upwardly from the forward end of anequalizer bar 19' which at its forward The draft frame comend carries the forward roller disk shaft 20, and at its rear end carries the rear roller disk shaft 21.

The equalizer bar is of offset formation comprising a depressed rearwardly extending leg 22 merging at its forward end into a head portion 23, which latter terminates in an upstanding shoulder 24 provided with teeth 25 which are held in mesh with the teeth 13 by the link whose object and pur 3056 is simply to hold the parts in intermes ing relation. The location of the teeth is preferably in advance of the medial line between the front and rear axles, and these teeth are located above the plane of the two axles, and when the parts occupy the normal relation indicated in Fig. 1, the center tooth of the series 25, will mesh with the center recess of the series 13, so that this medial point in the co-acting series of teeth will constitute a point for the application of a draft thrust imparted through the bracket 12 from the point of connection of the tongue 10 with the tractor or other source of draft, as the case may be.

The line of draftwill normally lie in an upwardly sloping line substantially as indicated by the dotted lines of Fig. l, and in these circumstances the down thrusting component of the draft pull, or the lever action thereof as it may be termed, will be in ratio to the vertical distance from the center of the front axle to the draft line. Obviously, in these circun'istanees, if this distance be increased, when the front rank of disks drops down into a dead furrow, the leverage effect of the draft and the consequent down thrust on the front rank will be increased, which is a condition which the present invention is designed to avoid.

By an inspection of Fig. 2, it will be observed that when the front rank rolls down into a depression, there will be a rocking or rolling of the gear teeth on one another, with the result that the point of application for the draft will now lie at the point of intern'ieshing between the lowermost teeth of the two series. In these circumstances the draft line will be correspondingly lowered so that the vertical distance between the front axle and the draft line will be actually lessened with the parts proportioned as indicated, and with the attendant result that in these circumstances less than the normal amount of the draft down thrust will be imposed upon the front rank so that a condition will be established most favorable to the lifting and rolling of the front rank out of the depression. This lessening of the draft on the front rank will necessarily redispose the draft in such a way that a larger component of the draft effect will be momentarily imposed upon the rear rank which is desirable in order to cause the rear rank, when elevated as shown in Fig. 2, to

press or scoop down an increased amount of earth to fill up the depression.

Fig. 3 illustrates the disposition of the parts when the front rank is riding up over a ridge, and in these circumstances the intcrmeshing teeth will be the ones at the upper ends of the two series. so that in this adjustment the draft line will rise with the front rank and maintain or even iuci ease the leverage action in such a way as to impose a greater than normal component of the draft effect upon the front rank, with the result that in these conditions the effective action of the front rank will be increased which desirable in forcing down or sprcadin; cut the ridged up soil and with a corresponding reduction in the pressure of the rear rank, which equally desirable in the circumstances mentioned.

In maintaining the g ar teeth in meshing relation. it is desirable that the linkage shown should be of a somewhat loose character in order that it may not interfere with the proper iutermeshing of the gear teeth 'ith one another, or with the readjustment of the parts under the conditions described, although it is obvious that in lieu of the linkage shown. other means might be provided for holding the parts in assembled relation without departing from the spirit of the invention.

It is not. deemed necessary to illustrate or describe any of the special means: commonly employed in the art for journaling the gang shafts, or for pern'iitting quick detachment of the parts, since such mechanisms are well understood by those skilled in the art, and form no part of the present invention.

Furthermore it is obvious that in carrying out the details of the present invention. the arcuate arrangement and location of the intermeshing teeth can be changed or modified to vary the extent or degree to which the draft effects will be redistributed under operating conditions, and is hence not intended to limit the invention to one in which the draft action will be absolutely reduced when the draft point is lowered, or absolutely increased when it is raised, since any advantageous redistribution of the draft to reduce or minimize the results attending the employment of a fixed pivotal point as a draft center by means of the character herein shown and described is deemed to be equally within the scope of the present invention.

I claim:

1. In an implement of the class described, the combination of a draft frame, a front axle provided with roller elements, a rear axle provided with roller elements, an equalizing connection for carrying the two axles, and engaging rolling elements on the equalizer connection and the draft frame respecill) tively so disposed as to lower the point of engagement with said rolling elements when the front axle is disposed-below normal, and to elevate the point of engagement of said rolling elements when the front axle is elevated for redistributing the draft in con formity with the variations in ground con ditions, substantially as described.

In an implement of the class described, the combination of a draft frame provided at each end with a depending bracket having formed thereon an arcua-tely configured draft imparting surface, an equalizer frame couctin with each depending bracket, and having formed thereon a suitably configured draft receiving surface in coacting relation with the draft ii'i'iparting surface, a front axle carried between the forward ends of the equalizer frames and roller elements carried thereby, a rear axle carried between the rear ends of the equalizer frames and roller elements carried taereby, and means for maintaining the draft applying surfaces in coacting relation with one another, the arrangement being such that when the front axle is elevated the point of contact between said surfaces will becorrespondingly elevated, and when the front axle is depressed the point of contact will be correspondingly depressed to vary the application of draft effect in conformity with variations of the conditions of the ground, substantially as described. r

3. in an implement of the class described, the combination of a draft frame provided at each end with a depending bracket hav formed thereon a suitably configured dral in'iparting surface, an equalizer frame enacting with each depending frame, and having formed thereon a suitably configured draft receiving surface in coacting relation with the draf imparting surface, a front axle carried between the forward ends of the equalizer frames and roller elements carried thereby, a rear axle carried between the rear ends of the equalizer frames and roller elements carried thereby, and a link for each of the equalizer frames pivotally connected at one end to said frame and at the other end to the depending bracket for maintaining the draft applying surfaces in coacting relation, substantially as described.

i 4. In an implement of the class described, the combination of a draft frame provided at each end with a depending bracket, each of the brackets having formed on its forward edge a series of arcuately disposed gear teeth, an equalizer frame coacting with each of the depending brackets, and having formed thereon a series of rearwardly facing suitably disposed gear teeth Vmeshing with the forwardly facing gear teeth on the lniacket, a front axle mounted between the forward ends of the equalizer frames and roller elements carried thereby, a rear axle mounted between the rear ends of the equalizer frames and roller elements carried thereby, and means for holding the gear teeth in meshing relation, the parts being so disposed as to relatively elevate the intermeshing points when thefront axle is elevated, and to relatively depress the intermeshing points when the front axle is depressed to vary the draft effect in conformity with variations in the condition of the ground, substantially as described.

5. in an implement of the class described, the combination of a draft frame provided at each end with a depending bracket haw ing formed on its front face a series of suitably disposed forwardly facing gear teeth, an equalizer frame coacting with each bracket and shouldered at a point in advance of its fore and aft center to afford an elevated front portion provided with a series of rearwardly facing teeth in mesh with the forwarding facing teeth on the bracket, a link pivoted at its forward end to the equalizer frame, and at its rear end to the bracket for holding the teeth in meshing relation, a front axle carried between the forward ends of the equalizer frame and roller elements carried thereby, and a rear axle carried by the rear ends of the equalizer frames and roller elements carried thereby, the parts being so related'that the point of effective engagement of the teeth will be relatively lifted by the lifting of the front axle and lowered by lowering of the front axle to redistribute the draft connection in con 'formity with variations in the ground con ditions, substantially as described.

nannv s. DICKINSON. 

